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Tems11 [23]
2 years ago
9

Y=3x+14 2x-3y=-14 Substitution method

Mathematics
2 answers:
riadik2000 [5.3K]2 years ago
5 0
X=-8






I know it’s that so it’s does not need a explanation
Montano1993 [528]2 years ago
4 0

Answer:

x = -8

Step-by-step explanation:

y = 3x + 14

2x - 3y = -14

So, what is the substitution? Y of course, this is because y is equal to 3x + 14.

2x - 3 (3x + 14) = -14

Multiply 3 with the numbers in the parentheses.

2x - 9x + 42 = -14

So you maybe be wondering why it is a negative 7 instead of subtracting 9 with 2. Using PEMDAS, we always read from left to right. So it is basically 2 -9 and you get -7.

-7x + 42 = -14

Then subtract 42 from both sides.

-7x + 42 - 42 = -14 - 42

Simplify

-7x = -56

Divide 7 by both sides.

-7x / 7 = -56 / 7

x = -8

And you might ask, why we get x instead afterwards. This is because both -7 and 7 cancel each other out leaving us with x.

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C=30m+50 and c=20m+100<br> solve for m pls help
Sholpan [36]

Answer:

m=5

Step-by-step explanation:

c=30m+50

c=20m+100

substitute

20m+100=30m+50

like terms

100-50=30m-20m

50=10m

m=5

6 0
3 years ago
Read 2 more answers
EVALUATE THE FOLLOWING EXPRESSION <br> 6-2+4-8
Nikitich [7]

6-2+4-8 = 4+4-8 = 8-8 = 0

7 0
3 years ago
Quadrilateral DEFG has vertices D(−2,4) , E(4,7) , F(10,3) , and G(8,0) .
fredd [130]

A rotation 270° counterclockwise about the origin is the same as rotation 90° clockwise about the origin and has a rule:

(x,y)→(y,-x).

Then:

  • D(−2,4)→D'(4,2)
  • E(4,7)→E'(7,-4)
  • F(10,3)→F'(3,-10)
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Answer: the coordinates of vertices of quadrilateral D′E′F′G′ are D'(4,2), E'(7,-4), F'(3,-10), G'(0,-8).

8 0
2 years ago
dianna made several cakes yesterday. each cake required 2 2/3 cups of flour. all together, she used 13 1/3 cups of flours. how m
Kay [80]

13 1/3 divided by 2 2/3

= 40/3 /8/3= 5

Hope that helps!


3 0
3 years ago
Read 2 more answers
5 wars of corn for $1.55. What was the cost per ear?
Delvig [45]

Answer:

$0.31

Step-by-step explanation:

1.55/5=0.31

So if each ear of corn cost $0.31 than 5 times .31 should equal $1.55

5x.31=1.55

Yes!

7 0
3 years ago
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